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Explain in detail the crop rotation
in Irrigation Engineering by  

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Crop Rotation : It is the process of changing the type of crop for cultivation on same land.It is advantageous because land will becom fertile and less fertilizers will be used and by sowing blackgram or red gram like pulses in the filed the useful nitrogenous bacteria will develop inside the roots and they give fertility to the land.It is also helps to less use of pesticides etc...
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